Found 11 resources at the 9-12 grade level for the concept: Science works only with testable ideas. (P2, P3, NOS2)

Exploring bouncing ballsStudents explore the physical properties of a variety of balls and how they bounce. Students then reflect on the process they used by charting their pathway on the Understanding Science Flowchart.

The checks labStudents construct plausible scenarios to explain a series of canceled bank checks. They revise their original hypotheses with new evidence and learn how human values and biases influence observation and interpretation.

Newton's 2nd law: Inquiry approachStudents act as colleagues of Isaac Newton. Students focus on how to design a procedure to test Newton's hypothesis and then communicate that idea to others. The emphasis is on the process rather than the actual results.

Designing your very own science experimentStudents design and carry out an experiment using pill bugs (isopods). Other organisms could be used in place of the pill bugs. Students reflect on the process used by charting their pathway on the Science Flowchart.

Rutherford's enlarged: A content embedded NOS activityStudents reason about a model of Ernst Rutherford's famous experiment supporting the idea of the atomic nucleus. They differentiate between observation and inference and see the role of creativity in the process of science.

Introducing the Understanding Science flowchartStudents participate in a quick activity and discuss whether they were doing science. They then read a story about Walter Alvarez, discuss the process of science, and trace his scientific journey using the Science Flowchart.

Investigating a Deep Sea MysteryIn this lab activity, students examine authentic morphological and phylogenetic data of three fish families and then pose and test alternative hypotheses about the fishes' classification.

Anolis LizardsStudents "travel" to the Greater Antilles to figure out how the Anolis lizards might have evolved there. Students make observations, ask questions, share data, form hypotheses, generate expectations, get more data, interpret them, and test their ideas.

Investigating a Crime SceneTwo suspicious dogs and a shredded book provide a perfect combination for focusing on the process of science and to do so with a bit of a chuckle. This powerpoint has been developed so that you can ask for student responses throughout.

Amazon flyThis short activity quickly engages the participants in the process of developing testable hypotheses. Students come up with multiple hypotheses to explain a set of observations and figure out how to test these hypotheses.